Recent Earthquakes in California and Nevada
== PRELIMINARY EARTHQUAKE REPORT ==
Southern California Seismic Network: a cooperative project of
U.S. Geological Survey, Pasadena California
Caltech Seismological Laboratory, Pasadena, California
Version #3: This report supersedes any earlier reports of this event. This is a computer-generated message. This event has not yet been reviewed by a seismologist.
A micro earthquake occurred at 8:41:34 AM (PDT) on Thursday, March 12, 2026.
The magnitude 1.2 event occurred 4 km (3 miles) SSE of Ontario, CA.
The hypocentral depth is 4 km ( 3 miles).
| Magnitude | 1.2 - local magnitude (Ml) |
| Time | Thursday, March 12, 2026 at 8:41:34 AM (PDT) Thursday, March 12, 2026 at 15:41:34 (UTC) |
| Distance from |
Ontario, CA - 4 km (3 miles) SSE (149 degrees) Chino, CA - 8 km (5 miles) E (82 degrees) Mira Loma, CA - 9 km (5 miles) WNW (292 degrees) Upland, CA - 9 km (6 miles) SSE (155 degrees) Montclair, CA - 10 km (6 miles) SE (129 degrees) |
| Coordinates | 34 deg. 1.3 min. N (34.022N), 117 deg. 36.3 min. W (117.605W) |
| Depth | 4.48 km (2.80 miles) |
| Quality | Good |
| Location Quality Parameters | Nst=52, Nph=88, Dmin=1.3 km, Rmss=0.21 sec, Erho=0.2 km, Erzz=0.38 km, Gp=42 degrees |
| Event ID# | ci41203111 |
| Additional Information | Map |
For more information, see https://earthquake.usgs.gov
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